<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script src="lib/vue.js" type="text/javascript" charset="utf-8"></script>
	</head>
	<body>
		<div id="app">
			<input type="text" v-model="n1" />
			<select v-model="opt">
				<option value="+">+</option>
				<option value="-">-</option>
				<option value="*">*</option>
				<option value="/">/</option>
			</select >
			<input type="text"  v-model="n2" />
			<input type="button"  value="=" @click="calc" />
			<input type="text"  v-model="result" />
		</div>
		<script type="text/javascript">
			var vm = new Vue({
				el:'#app',
				data:{
					n1:0,
					n2:0,
					result:0,
					opt:'+'
				},
				methods:{
					calc(){//计算器
					/* 	switch(this.opt){
							case '+' :
								this.result = parseInt(this.n1) + parseInt(this.n2);
								break;
							case '-' :
								this.result = parseInt(this.n1) - parseInt(this.n2);
								break;
							case '*' :
								this.result = parseInt(this.n1) * parseInt(this.n2);
								break;
							case '/' :
								this.result = parseInt(this.n1) / parseInt(this.n2);
								break;
						} */
						/* 投机取巧的方式，正式开发中，尽量少用 */
						var codeStr = parseInt(this.n1) + this.opt + parseInt(this.n2)
						this.result = eval(codeStr);
					}
				}
			})
		</script>
	</body>
</html>
